Background: Optimized the design of Weply (UI, UX design), the peripheral store app of Korean entertainment companies to make it applicable for a variety of mobile terminals; - Product pain points: use lag, unreasonable use process, lack of elements and buttons, and poor design style; - User research: Designed 300+ questionnaire and issued them to users to collect user needs and write user experience research and analysis reports; - UI design: Changed the main color of artists, optimized the screen layout, designed the preview and promotion sections, beutified page look and boosted the purchase rate; - UX design: Designed a concise use process, optimized the product detail page, and enhanced user experience;